Preface to the Princeton Landmarks in Biology Edition vii Preface xi Symbols Used xiii 1. The Importance of Islands 3 2. Area and Number of Speicies 8 3. Further Explanations of the Area-Diversity Pattern 19 4. The Strategy of Colonization 68 5. Invasibility and the Variable Niche 94 6. Stepping Stones and Biotic Exchange 123 7. Evolutionary Changes Following Colonization 145 8. Prospect 181 Glossary 185 References 193 Index 201

The Theory of Island Biogeography

We consider 27 population and community terms used frequently by parasitologists when describing the ecology of parasites. We provide suggestions for various terms in an attempt to foster consistent use and to make terms used in parasite ecology easier to interpret for those who study free-living organisms. We suggest strongly that authors, whether they agree or disagree with us, provide complete and unambiguous definitions for all parameters of their studies.

/pdf/parasitology-meets-ecology-on-its-own-terms-margolis-et-al-4c6w2pahe6.pdf

Parasitology meets ecology on its own terms: Margolis et al. revisited.

The Cambridge Structural Database (CSD) contains a complete record of all published organic and metal–organic small-molecule crystal structures. The database has been in operation for over 50 years and continues to be the primary means of sharing structural chemistry data and knowledge across disciplines. As well as structures that are made public to support scientific articles, it includes many structures published directly as CSD Communications. All structures are processed both computationally and by expert structural chemistry editors prior to entering the database. A key component of this processing is the reliable association of the chemical identity of the structure studied with the experimental data. This important step helps ensure that data is widely discoverable and readily reusable. Content is further enriched through selective inclusion of additional experimental data. Entries are available to anyone through free CSD community web services. Linking services developed and maintained by the CCDC, combined with the use of standard identifiers, facilitate discovery from other resources. Data can also be accessed through CCDC and third party software applications and through an application programming interface.

https://journals.iucr.org/b/issues/2016/02/00/bm5086/bm5086.pdf

The Cambridge Structural Database

Statistics for Spatial Data.

This book is the second of two volumes in a series on terrestrial and marine comparisons, focusing on the temporal complement of the earlier spatial analysis of patchiness and pattern (Levin et al. 1993). The issue of the relationships among pattern, scale, and patchiness has been framed forcefully in John Steele’s writings of two decades (e.g., Steele 1978). There is no pattern without an observational frame. In the words of Nietzsche, “There are no facts… only interpretations.”

https://esajournals.onlinelibrary.wiley.com/doi/pdf/10.2307/1941447

The Problem of Pattern and Scale in Ecology: The Robert H. MacArthur Award Lecture

TeI3AsF6 was prepared quantitatively from the reaction of iodine, tellurium, and arsenic pentafluoride in sulphur dioxide solution. Single crystals of TeI3AsF6 are monoclinic, a = 8.243(2), b = 10....

The synthesis and X-ray crystal structure of triiodotellurium(IV) hexafluoroarsenate(V), TeI3AsF6

Crystallographic data are presented for a series of Os(IV−VI) hydrazido complexes. The structural changes with electron content including a shortening of the Os−N bond and an increase in the Os−N−N angle from Os(IV) to Os(VI) can be rationalized by an electronic structural model. This model predicts an increase in electron donor character of the hydrazido ligand from four to six electrons from Os(IV) to Os(VI). The structures of trans-[OsVI(tpy)(Cl)2(NN(CH2)4O)]2+ and cis-[OsIV(tpy)(Cl)(NCCH3)(NN(CH2)4O)]+ are illustrated.

Effect of Stepwise Oxidation on Molecular Structure in Osmium Hydrazido Complexes

The crystal structure of S3N2O2 has been redetermined and the structure refined to a final R of 0.057 and Rw of 0.076 for 550 reflections with I ≥ 2σ(I). S3N2O2 is planar and of C2v symmetry, as previously found by Weiss. The central S—N distances and angle are 1.647(3) A, NŜN 97.3(2)°, with adjacent N—S distances and angles of 1.535(3) A, , and terminal S—O distances and angles of 1.446(4) A, NŜO 118.0(2)°. The infrared and Raman spectra are reported and some assignments are made.

The redetermination of the crystal structure of trisulphur dinitrogen dioxide

Structural characterization of [κ2-(t-Bu)2PCH2C(O)C6H5]PdMe(η2-C2H4)+BAr'4-: A model for the catalyst resting state for ethylene polymerization

The salt [SNS][AsF6] undergoes a quantitative multiple cycloaddition reaction with cyanogen to give the planar, centrosymmetric dication ([graphic omitted])22+, which has been characterised by vibrational and 13C NMR spectroscopy, chemical analysis and X-ray crystallography. While the reaction between cyanogen and SNS+ must proceed via a 1 : 1 cycloadduct, NC[graphic omitted]+, this was not prepared or observed. The cycloaddition of SNS+ to NC[graphic omitted]+ must therefore be kinetically preferred, contrary to arguments based on simple frontier molecular orbital (FMO) theory. By contrast, the reaction of [SNS][AsF6] with [NC[graphic omitted]CH][AsF6] to give [H [graphic omitted]]–[graphic omitted]][AsF6]2 was complete only after 10 weeks at 50 °C, in complete accord with FMO theory. These results are rationalised in terms of the influence of high-energy, in-plane molecular orbitals and the electrostatic interaction between SNS+ and the slightly negatively charged nitrogen atom (N) in the [graphic omitted]+ ring, which facilitates the second cycloaddition. The salt [([graphic omitted])2][AsF6]2 potentially provides access to a new family of eight other bicyclic CNS dications, radical cations and diradicals, of which .[graphic omitted]–[graphic omitted]+, +[graphic omitted]–[graphic omitted]˙ and +[graphic omitted]–[graphic omitted]+ are reported.

Peter S. White

Papers

The synthesis and X-ray crystal structure of triiodotellurium(IV) hexafluoroarsenate(V), TeI3AsF6

Effect of Stepwise Oxidation on Molecular Structure in Osmium Hydrazido Complexes

The redetermination of the crystal structure of trisulphur dinitrogen dioxide

Structural characterization of [κ2-(t-Bu)2PCH2C(O)C6H5]PdMe(η2-C2H4)+BAr'4-: A model for the catalyst resting state for ethylene polymerization

5,5′-bi(1,3,2,4-dithiadiazolylium)(2+) bis[hexafluoroarsenate(V)]: a general synthetic strategy to molecules and radicals containing thiazyl rings